Drying tumbler



b. H. BENJAMIN DRYING TUMBLER Filed June 9 1919 3 Sheets-Sheet 1 D. H. BENJAMIN DRYING TUMBLER Filed June 9, 1919 3 Sheets-Sheet 2 v D. H. BENJAMIN DRYING TUMBLER Filed June 9. 1919 :s Sheets-Sheet 5 mx a Patented Ma B3, 1924.

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DRYING Application filed June}, 1918. Serial No. 802,748.

To all whom it may comm:

Be it known that I, DANA H. BENJAMIN, a citizen of the United States, residing at Cleveland Heights, in the county of Cuya This invention relates to drying tumblers m such as are used for drying clothing or wearing apparel in a laundry, or for removin asoline or other cleaning agents from 0t ing in a dry cleaning plant.

The object of the invention is to provide a multiple compartment dryin tumbler which simultaneously dries a urality of separate char es of work, an in which heated air is dlstributed more uniformly and thoroughly through and over the material being dried, so as to increase efiiciency.

A further object of the invention is to provide an improved drying tumbler ineluding a rotar drum in which the material to. be drie is tumbled, together with means for circulating air from the outside through said drum and also from its center A and a ong its axis outwardl through the drum to thereby improve t feats.

Further objects of the invention are in art obvious and in part will appear more in detail hereinafter.

. In the drawings, which re resent one embodiment of the invention, ig. 1 is a sectional elevation on the line 1--1, 2,

looking in the direction of the arrows; ig.

2 is a sectional elevation on the ,line 2-2,

Fig. 1, parts being omitted for simplicity of illustration; Fig. 3 is a detail view lookingin the direction of the arrow A, Fig. 1;

' and Fig. 4 iso. broken out plan view.

The tumbler shown in the drawings comprises a suitable outer casing or jacket 1 eating chamber 2 in which are the usual heating coilsB communicating with a suitable source ,of. heat, such as steam or. the like. In said casing is a dryingchamber 4 surrounded b a substantially cylindrical wall 5 provi ed with an opening 6 at its top communicating with a channel or pas- '7 coming from the heating chamber 2, an at its'bottom having anope 8 leading to the screening'chamber'9 in w ch are 7 ing e drying ef tumbling 'wall 20 formed of screen, or like foramnious material connectvprovided with an inner wall 1 forming a the usual screens 10 for removing lint and foreign matter carried from the work to said screens by the air current. The screenmg chamber communicates through an o ening 11 and channel 12 with the suction side of a fan or pump :13, which delivers a current of air through a passa' e 14 extend mg beneath the heating cham r and having an outlet 15 to the atmosphere. Communication between said 'assage and the heatin chamber is throug the opening 16 contro ed by a movable door 17. In the upper osition of said door,-illustrated in dotted es Fig. 1, communication to the heating chamber is entirely out off and the entire air current passes out to the atmos= ered'by' the fan 13 flows throu h the heatchamber and part flows. neath the edge of said door. and out through the passage 15, all as more fully described in a phere. In the lower position of said door, shown in full lines, part of the air deliv prior application of John J. Dewey for drying' apparatus, Serial No. 211,531, filed J anuary I2, 1918, to which reference ma be had for a more complete description 0 the general construction of the tumbler. 18 represents a screen inlet from the atmos here to the screening chamber, and 19 a suitable hinged door providing access to thendrying chamber 4 within the cylindrical we 5. .7

In said dry chamber is located the rforated metal, wire ed to the two end heads or discs 21. #At the cen 'or axis of said drum is a hollow drum aving a cylindrical outer shaft or tube 22 extending at one end through one pf the discs 21 into a bearing 23 hi thestationary frame. The cavityor space within the tumbling drum-isdivided into a lurality of compartments 24, three being own, which com artments lie between the radiall exten g walls 25 connecting the cylin or 20 and tube 22. These walls maybe of-any suitable term-but are constructed of perforated metal, wire mesh,

or foramineus material similar tothe cylinder 20. Each compartment is provided with a door 26 afiording communication thereto and which doors in turn can be brought into registry with the opening at the door 19 of the outer casing. I

.said fan communicating through a passage 29 with a hollow tube 30 entering the open attacked by end of the tube 22, the opposite end of which tube is closed and rotates in a bearing in the casing similar to hearing 23. Tube 22 is also provided with several series of 0 enings 31, shown as longitudinally exten ing slots distributed at intervals along the tube, each series of which slots provides communication from the channel 32 in the tube to one of the compartments 23.

The operation of the tumbler will be readily understood. By manipulation of the doors 19 and 26 charges of clothing, wearing apparel or other material to be dried can be readily inserted into or removed from any or all compartments of the drum. The doors being closed the drum is then rotated by any suitable means (not shown) and the fans or blowers started. Air is drawn in through the inlet 18, passes through the screening chamber and is delivered by the fan 13 to the heating chamber, a part of the air passing out through the outlet 15. The heated air in chamber 2 is divided and fiows along two separate paths. A part of said air flows through the channel 7 and opening 6 into the outside of the drying chamber and flows across said chamber through the drum and material therein to the outlet 8 where it enters the screening chamber and is again circulated through the tumbler by the fan 13. The second current of air from the heating chamber passes through the fan 27 and is, distributed by the hollow tube 22 alongthe full length of the axis of the drum, so that said heated air is directed immediately upon the material at the center of the drum. This current of air then flows out through the outlet 8 and 101118 and is circulated again with the remainingair. Consequently, there is a con tinuous and repeated CIICIIlatIOD of air through the machine, a constant inflow of some air through the inlet 18, and. a constant discharge of the heavier moisture laden air to the atmosphere. The material being dried is attacked from all sides by heated air and is consequently dried more rapidly.

The construction described prevents the material in the drum from balling up into a sol1d mass whose interior is not directly an air current but continually breaks up the material and thoroughly distributes heated air therethrough.

' YVhfit claim is: I

rym apparatus, comprising a casing provided wl th a dryingchamber, and means or introducing two streams of air into said chamber, one of said streams entering the drying chamber near its periphery and the other near its center.

2. Drying apparatus, comprising a casing provided with a drying chamber, a rotary foraminous drying drum therein,-a perforated hollow shaft for said drum, and

means for introducing a stream of air through said hollow shaft to said chamber and for withdrawing it from the periphery of said drum. I

3. Drying apparatus, comprising a casing provided with a drying chamber, a rotary drying drum therein, and means for introducing a stream of air to said chamber along the axis of said drum, and means for screening said air and returning it to said chamber.

a. Drying apparatus, comprising a casing, a rotary drying drum therein provided with an axially extending perforated hollow shaft communicating with the chamber insaid drum, and means for supplying air through said shaft and withdrawing the same from the periphery of said drum.

5. Drying apparatus, comprising a casing,-

a rotary drying drum therein provided with an axially extending hollow. shaft communicating with the chamber in said drum, means for supplying air to said shaft, and additional means for conducting a separate current of air to the periphery of said drum.

6. Drying apparatus, comprising a casing provided with a drying chamber, a foraminous drying drum therein provided with a perforated hollow shaft and with radial partitions forming a series of compartments, and a door for each compartment.-

7. Drying apparatus, comprising a casing provided with a drying chamber, a drying drum therein provided with partitions forming a series of compartments, and means for distributing air along substantially the full axis'o'f the drum to eachof said compartments.

8. A drying tumbler, comprising a casing provided with drying and heating chambers, conduits connecting said chambers and entering said drying chamber at different oints for conducting separate streams of lieated air thereto, and means for returning said air to the heating chamber.

9. A drying tumbler, comprising a casing provided with drying and heating chambers,

Tfior returning moist air to the heating chamer.

11. Drying apparatus, comprising a casing provided with heating and drying chambers, a rotary drying drum in said drying chamber, means for conducting air from the heating chamber to the drying chamber, and

separate means for conducting air from the heating chamber to the drying drum and for distributing the same, along the axi thereof.

12. Drying apparatus, comprising-a casing provided with heating and drying chainhers, a rotary drying drum in the drying chamber and provided with a perforated hotlow shaft, said drum being provided with radial partitions forming a plurality of compartments, and means at the center of said'drumfor supplying air from'said'heating chamber through said hollow shaft to each of said compartments.

13. Drying apparatus, comprising a 0215- 

